Cold shut for steel chains



March 8, 1932. w. H. NOURSE COLD SHUT FOR STEEL CHAINS Filed March 12, 1950 /V TTUFKNE/ a and fails to service.

Patented Mar. 8, 1932 STATES WALTER HLNO'URSE, OF PORTLAND, OREGON, ASSIGNOR TO ELECTRIC STEEL FOUNDRY COMPANY, OF PORTLAND, OREGON ooLn SHUT non STEEL CHAINS Application filed March 12, 1930. SeriallNo. 435,220.

This invention relates generally to the making of cold shuts, and particularly to the making of same from manganese steel castings.

The main object of this invention is to provide a. novel form of cold shut in the form of a manganese steel casting.

.The second object is to permit the use of manganese steel in the construction of cold shuts, thereby enabling same to resist wear in a marked degree as compared with cold shuts madeof other materials.

These, and other objects, will become more apparent from the specification following as illustrated in the accompanying drawings.

Before entering into an explanation of this device it will be understood that cold shuts have long been made of forgings but castings have not been employed for this purpose since it was impractical to bend them cold, and manganese steel castings which were peculiarly shaped on account of their wearresisting properties were not used, due to the fact that when heated for the purpose of bending same the manganese becomes brittle In order to overcome I these difficulties there is constructed a cold shut whose form makes it possible to construct same of manganese steel and whose shape permits same to be bent sufficiently to close same without in any way injuring the "material of which the cold shut is formed.

Figure 1 is a side elevation of theopen device. Figure 2is an end elevation of Figure 1. v Figure 3 is a side elevation of the closed device showing same joining parts of a chain. Figure 4 is a section taken along the line 4l4 in Figure 3. Figure 5 is a section-taken along the line 55 in Figure 3. Figure 6 is a section taken along the line 66 in Figure 1.

of the side 10 merges into a rounded end 13 which itself merges into a second straight side 14 which is bendable with relation to the side 10, and when cast is not parallel thereto but diverges sufiicientlyto permit a chain link 15 to pass between the face 16 of the flattened end 17 and the face 18 of the shank '12. T he end 17 is provided with an elongated perforation 19 which tapers to conform to the shank 12 and is provided with a countersink 20 on its outer face.

The cross section of the link sides 10 and 14 is preferable as shown in Figure 6 which provides the maximum strength from a given weight of steel casting of the longitudinal shape required for this purpose.

It will be noted in Figure 8 that the side 14 has been moved to a position parallel with the side 10 and that the shank 12 now occupies the perforation 19 and that the face 18 projects to the position shown in dotted lines/ The operation of the device is as follows: It is first made of a special grade of steel casting which will permit bending when cold in the shape shown in Figure 1. Whatever objects are to be joined thereby are first connected to the cold shut which is then closed, preferably by placing same between the jaws of a vise and forcing the ends together, as shown in Figure 3, and completing the operation by setting the bend with the blows of a hammer and then flowing the projecting portion of the shank 12 into the countersink 20 by a peening operation.

It will be seen that by this construction certain prevailing conditions are utilized to produce a cheap strong cold shut which will resist wear better than a forged cold shut.

It will also be observed that a manganese steel casting can be employed for this purpose which provides the wear resisting quality to the cold shut, and that although this material is susceptible to considerable bending without injury it requires only a very small bend in order to move the side 14 from an open position to a fully closed posi tion, and this bend is so uniformly distrib uted around the curve of the end 13 as to make same almost negligible and without measurably detracting from the ultimate strength of the parts involved.

As previously suggested, the use of cold shuts is of itself not new I am therefore not claiming such devices broadly, but I do intendtocover all such forms and modifications thereoi as fall fairly ithin the apo pended claims.

'I claim: I T 1. A manganese steel cold' shut-consisting of a fixed side terminating in a pair 0t round ed ends, one of said ends havinga laterally 1 projecting shank formed thereon 'normalto said straight side and the (other rounded end merging into a bendable straight side'hav- V .ingaperforation formed therein adapted to receive said shank, I 1 P 2. A manganese steel cold shut consisting p of a pair of converging straight sidesjoined 2 together by a rounded portion, one of said straight sides terminating in aroundedend having a, laterally extending shank, the op- V positestraight side terminating in a perforated end adapted to engage said shank e2 when saidstraight sides are moved to 'a parallel relationship. p 7 Y 3. A; manganese, steel cold shut consisting ofa pair of convergingstraight sides having a somewhat-rounded connecting: portion, the J end oione of said straight sides opposite said joiningportion having a hook formed thereon terminating in a laterally projecting shank lying in" the plane of said straight sides, the adjacent end of the opposite side having a perforation therein corresponding With-said shank and adapted to receive same Whensaid straight sides are moved into par- .allelism.- v V o 40, WALTER-H. NOURSE. 

